We have two children there. Oldest got a music scholarship in Y9, both have a Maths scholarship and youngest has an Arts scholarship.
The music one is amazing, one free lesson a week, and was in two ensembles last year. Music concerts are incredible - so much opportunity to join large bands, choirs, ensembles.
One note I would say is a full music scholarship doesn't guarentee entrance - I think if you are in the top % you are fairly sure. We know of someone on a full music scholarship who didn't get in (but was then offered a place over summer which they took).
I didn't think our oldest would like it due to the size but he has loved it. Our youngest who loves art, which was almost mocked by some at his primary, it's a game changer. Art at the front as you walk it - it's not some token sideshow, it's front and centre, and he's found lots of people who also love it which has been brilliant for him.
As others have said, the size of the school has been a positive as there is so much opportunity for subjects to study (4 languages offered, 4 art subjects, theatre, classic civilisation, music etc) and so many extra curricular clubs it allows you to 'find your tribe'.
Y7s finish earlier with Y11s, and have breaktimes only with this group with is great and reduces the chances of bullying from older groups. They basically never have lunch with a group directly one year younger or older which also means more space during lunch.
Like all schools, not everything is perfect, the admin could certainly be better at times and some kids will be unhappy and some children with leave as with all schools. A lof of the nagativity you see online comes from parents who don't have children there so in terms of actual experience it can be hard to filter who has direct epxerience, and complaints about the admissions process etc which is a seperate discussion.
Good luck - for a state school the music is really is an amazing offering.